package cn.cj.erp.common;

import com.baomidou.mybatisplus.core.metadata.IPage;
import lombok.Data;

import java.util.List;

/**
 * 分页工具类
 *
 * @author chenjian
 */
@Data
public class Page<T> {
    /**
     * 总记录数
     */
    private int totalCount;
    /**
     * 每页记录数
     */
    private int pageSize;
    /**
     * 总页数
     */
    private int totalPage;
    /**
     * 当前页数
     */
    private int currPage;
    /**
     * 列表数据
     */
    private List<T> list;

    /**
     * 分页
     *
     * @param list       列表数据
     * @param totalCount 总记录数
     * @param pageSize   每页记录数
     * @param currPage   当前页数
     */
    public Page(List<T> list, int totalCount, int pageSize, int currPage) {
        this.list = list;
        this.totalCount = totalCount;
        this.pageSize = pageSize;
        this.currPage = currPage;
        this.totalPage = (int) Math.ceil((double) totalCount / pageSize);
    }

    /**
     * 分页
     */
    public Page(List<T> list, IPage<?> page) {
        this.list = list;
        this.totalCount = (int) page.getTotal();
        this.pageSize = (int) page.getSize();
        this.currPage = (int) page.getCurrent();
        this.totalPage = (int) page.getPages();
    }

    /**
     * 分页
     */
    public Page(List<T> list, Page<?> page) {
        this.list = list;
        this.totalCount = page.getTotalCount();
        this.pageSize = page.getPageSize();
        this.currPage = page.getCurrPage();
        this.totalPage = page.getCurrPage();
    }
}
